Re: 2-operand vs 3-operand instructions (John Bayko)
23 Sep 1997 23:22:17 -0400

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2-operand vs 3-operand instructions (sivaram) (1997-09-12)
Re: 2-operand vs 3-operand instructions (1997-09-23)
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From: (John Bayko)
Newsgroups: comp.compilers,comp.arch
Date: 23 Sep 1997 23:22:17 -0400
Organization: University of Regina, Dept. of Computer Science
References: 97-09-045
Keywords: architecture, performance

        sivaram <> wrote:
>Are there any papers/studies available that compare 2-operand (a += b)
>vs 3-operand (a = b+c). I am specifically looking for code size,
>cycle count, and register usage info.
>Some background:
>The ARM/THUMB is a 16-bit architecture.

        Thumb is a 16-bit instruction set, the architecture is still
        The Hitachi SH series also has 16-bit instructions, and includes
sixteen 32-bit registers.
        That's not terribly relevant to your question, but I thought it
was a point worth clarifying.

John Bayko (Tau).

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